diff --git a/src/game.js b/src/game.js
index 6619cc7..520e4a9 100644
--- a/src/game.js
+++ b/src/game.js
@@ -1,6 +1,9 @@
 class Game {
 
     constructor(canvas) {
+
+        this.canvas = canvas;
+
         // Create menu
         let menu = new Menu(canvas);
 
@@ -28,17 +31,20 @@ class Game {
             if (this.mainScreen.after === AfterMenu.Start) {
                 this.changeScreen(this.scene);
             } else if (this.mainScreen.after === AfterMenu.Exit) {
-                if (typeof window.close === 'function') {
-                    window.close();
+                if (navigator.app !== undefined && typeof navigator.app.exitApp === 'function') {
+                    navigator.app.exitApp();
                 }
-                // if (navigator.app !== undefined && typeof navigator.app.exitApp === 'function') {
-                //     navigator.app.exitApp();
-                // }
             }
         }
     }
 
     render() {
+        this.autoResize();
         this.mainScreen.render();
     }
+
+    autoResize() {
+        this.canvas.width = window.innerWidth;
+        this.canvas.height = window.innerHeight;
+    }
 }
diff --git a/src/main.js b/src/main.js
index 519cfe3..55945dd 100644
--- a/src/main.js
+++ b/src/main.js
@@ -1,4 +1,4 @@
-let game;
+let game, context;
 
 init();
 loop();